''Celastrina nigra'', the dusky azure, is a

butterfly Butterflies are insects in the macrolepidopteran clade Rhopalocera from the Order (biology), order Lepidoptera, which also includes moths. Adult butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. The ...

in the family

Lycaenidae Lycaenidae is the second-largest family of butterflies (behind Nymphalidae, brush-footed butterflies), with over 6,000 species worldwide, whose members are also called gossamer-winged butterflies. They constitute about 30% of the known butterfl ...

. The species was first described by William Trowbridge Merrifield Forbes in 1960. It resides in the extreme northeast corner of the U.S. state of

Georgia Georgia most commonly refers to: * Georgia (country), a country in the Caucasus region of Eurasia * Georgia (U.S. state), a state in the Southeast United States Georgia may also refer to: Places Historical states and entities * Related to the ...

. The larval host plant is ''

Aruncus dioicus ''Aruncus dioicus'', known as goat's beard, buck's-beard or bride's feathers, is a flowering herbaceous perennial plant in the family Rosaceae, found in Europe, Asia, and eastern and western North America. It is the type species of the genus '' ...

'' (goat's beard).

References

nigra Butterflies of North America Butterflies described in 1960 {{Polyommatini-stub